String Of Non Sub-Zero Temperatures At Rochester Ends

The temperature at the Rochester International Airport had not fallen below zero since January 21, 2012 (-12 degrees). Temperatures fell to -2 on December 30th, ending the string of non sub-zero days in Rochester at 343 days. This stretch breaks the January 27, 1987 through December 25, 1987 period for the longest stretch of days without a sub-zero temperature.

This stretch was so long due to January 21st (the last time the temperature fell below zero at Rochester) being the second earliest date for the last sub-zero temperature in a winter. Prior to last winter, the earliest date was January 19th during the 1991-92 winter. The normal date for the last sub-zero temperature is March 2nd.

The normal first date for the first sub-zero temperature in a winter is December 6th. This winter is a long ways from the latest first sub-zero temperature in a winter. This occurred during the 1908-09 winter when the first sub-zero temperature occurred on February 15th (-7 degrees).

Normally, Rochester has 30 sub-zero days in a winter. The least number of sub-zero temperatures in a winter is 6 during the winter of 2001-02. Last winter was the second least with 8 sub-zero days. Meanwhile, the greatest number of sub-zero days is 60 days (winter of 1977-78).